*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
a{
    text-decoration: none;
    color: #000;
}
ul,li{
    list-style: none;
}
input,button{
    border: 0;
}
.clear{
    content: "";
    display: block;
    clear:both;
}